A little puzzle that's been in my mind for a while and I figured I would ask, in case someone a little more knowledgeable could shed some light on it. Assuming one had a spaceship formed by two "hoops," one inside the other. If one of the hoops rotated at a velocity high enough to provide a sense of artificial gravity, and the other hoop remained stationary. A ladder or stairway would provide access between each hoops from the inside. If someone was inside the moving hoop, with gravity and all, then went into the stationary hoop, what would happen? I'm assuming this would take place in a low gravity environment. However, I'm wondering if the individual would start floating as he made his or her way down, or right at the moment they stepped off the ladder? Would someone in the stationary hoop floating right over the stairway suddenly crash on it as it moved under him? Here's a not so good drawing, if it helps any. [PLAIN]http://img203.imageshack.us/img203/6279/stairship.png [Broken] Thanks!